Cable Shielding Layer Bonding to Eliminate Air Gaps
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Solution Overview
Problem
Existing cables suffer from electromagnetic interference and signal leakage due to gaps and uneven metal foil wrapping, affecting signal transmission quality.
Innovation Solution
A cable design with a shielding layer fastened to the insulating layer to completely isolate it from air, using conductive coatings or vacuum metallization to form a continuous conductive layer, and optionally incorporating ground wires for enhanced shielding.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If metal foil is used for shielding layer, then shielding effect is improved, but air gaps and uneven wrapping reduce conductivity continuity
Solution Approach 1:
The patent replaces the mechanical metal foil wrapping system with an electrochemical deposition system. Instead of mechanically wrapping metal foil that creates air gaps and uneven surfaces, the invention uses electroplating or electroless plating to deposit a continuous metal coating directly onto the insulating layer, eliminating the mechanical wrapping defects while maintaining shielding effectiveness.
Solution Approach 2:
The patent changes the fundamental parameter of how the shielding layer is applied - from a mechanical wrapping process to an electrochemical deposition process. This parameter change transforms the shielding layer from a discrete foil structure with gaps to a continuous coating that conforms perfectly to the insulating layer surface, ensuring both shielding effect and conductivity continuity.
2Object-affected harmful factors
If metal foil is wrapped around insulating layer, then shielding effect is improved, but junctions are not airtight and affect signal transmission
Solution Approach 1:
The patent replaces the mechanical foil wrapping and joining system with an electrochemical coating system. The electroplating or electroless plating process creates a continuous metal layer that seamlessly covers the insulating layer without requiring junctions or overlaps, thereby eliminating air gaps and ensuring airtight coverage that prevents signal leakage.
Solution Approach 2:
The patent creates a composite structure where the metal shielding coating is chemically bonded to the insulating layer through electrochemical deposition. This composite approach ensures intimate contact between the metal and insulator surfaces, eliminating air gaps at interfaces and creating a unified shielding structure that maintains airtightness throughout.
3Object-affected harmful factors
If metal foil wrapping is not flat, then shielding effect is reduced, but achieving flat wrapping is difficult
Solution Approach 1:
The patent replaces the mechanical foil wrapping process that requires achieving flatness with an electrochemical deposition process. The electroplating or electroless plating automatically conforms to the insulating layer surface topology, creating a perfectly fitted metal coating without requiring manual flattening or complex wrapping techniques, thereby significantly easing manufacturing.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The design achieves better conductivity continuity, anti-electromagnetic interference, and improved shielding effectiveness by eliminating air gaps and ensuring consistent metal contact.
Implementation Method 1
a shielding layer disposed outside the insulating layer... the shielding layer is fastened to the surface of the insulating layer and completely isolates the insulating layer from air
Implementation Method 2
using conductive coatings or vacuum metallization to form a continuous conductive layer
Data Source
AI summary
A cable includes: a pair of inner conductors; an insulating layer covering the pair of inner conductors; a shielding layer disposed outside the insulating layer; and an outer layer covering the shielding layer; wherein the shielding layer is fastened to the surface of the insulating layer and completely isolates the insulating layer from air.